shared/gatt-server: Introduce bt_gatt-server

This patch introduces bt_gatt_server which will implement the
server-side of the ATT protocol over a bt_att structure and construct
responses based on a gatt_db structure.

Makefile.am

@@ -114,6 +114,7 @@ shared_sources = src/shared/io.h src/shared/timeout.h \
 			src/shared/att.h src/shared/att.c \
 			src/shared/gatt-helpers.h src/shared/gatt-helpers.c \
 			src/shared/gatt-client.h src/shared/gatt-client.c \
+			src/shared/gatt-server.h src/shared/gatt-server.c \
 			src/shared/gatt-db.h src/shared/gatt-db.c \
 			src/shared/gap.h src/shared/gap.c
 

src/shared/gatt-server.c

@@ -0,0 +1,122 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2014  Google Inc.
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "src/shared/att.h"
+#include "lib/uuid.h"
+#include "src/shared/queue.h"
+#include "src/shared/gatt-db.h"
+#include "src/shared/gatt-server.h"
+#include "src/shared/gatt-helpers.h"
+#include "src/shared/att-types.h"
+#include "src/shared/util.h"
+
+#ifndef MAX
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+struct bt_gatt_server {
+	struct gatt_db *db;
+	struct bt_att *att;
+	int ref_count;
+	uint16_t mtu;
+
+	bt_gatt_server_debug_func_t debug_callback;
+	bt_gatt_server_destroy_func_t debug_destroy;
+	void *debug_data;
+};
+
+static bool gatt_server_register_att_handlers(struct bt_gatt_server *server)
+{
+	/* TODO */
+	return true;
+}
+
+static void bt_gatt_server_free(struct bt_gatt_server *server)
+{
+	if (server->debug_destroy)
+		server->debug_destroy(server->debug_data);
+
+	bt_att_unref(server->att);
+
+	free(server);
+}
+
+struct bt_gatt_server *bt_gatt_server_new(struct gatt_db *db,
+					struct bt_att *att, uint16_t mtu)
+{
+	struct bt_gatt_server *server;
+
+	if (!att)
+		return NULL;
+
+	server = new0(struct bt_gatt_server, 1);
+	if (!server)
+		return NULL;
+
+	server->db = db;
+	server->att = bt_att_ref(att);
+	server->mtu = MAX(mtu, BT_ATT_DEFAULT_LE_MTU);
+
+	if (!gatt_server_register_att_handlers(server)) {
+		bt_gatt_server_free(server);
+		return NULL;
+	}
+
+	return bt_gatt_server_ref(server);
+}
+
+struct bt_gatt_server *bt_gatt_server_ref(struct bt_gatt_server *server)
+{
+	if (!server)
+		return NULL;
+
+	__sync_fetch_and_add(&server->ref_count, 1);
+
+	return server;
+}
+
+void bt_gatt_server_unref(struct bt_gatt_server *server)
+{
+	if (__sync_sub_and_fetch(&server->ref_count, 1))
+		return;
+
+	bt_gatt_server_free(server);
+}
+
+bool bt_gatt_server_set_debug(struct bt_gatt_server *server,
+					bt_gatt_server_debug_func_t callback,
+					void *user_data,
+					bt_gatt_server_destroy_func_t destroy)
+{
+	if (!server)
+		return false;
+
+	if (server->debug_destroy)
+		server->debug_destroy(server->debug_data);
+
+	server->debug_callback = callback;
+	server->debug_destroy = destroy;
+	server->debug_data = user_data;
+
+	return true;
+}

src/shared/gatt-server.h

@@ -0,0 +1,40 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2014  Google Inc.
+ *
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <stdint.h>
+
+struct bt_gatt_server;
+
+struct bt_gatt_server *bt_gatt_server_new(struct gatt_db *db,
+					struct bt_att *att, uint16_t mtu);
+
+struct bt_gatt_server *bt_gatt_server_ref(struct bt_gatt_server *server);
+void bt_gatt_server_unref(struct bt_gatt_server *server);
+
+typedef void (*bt_gatt_server_destroy_func_t)(void *user_data);
+typedef void (*bt_gatt_server_debug_func_t)(const char *str, void *user_data);
+
+bool bt_gatt_server_set_debug(struct bt_gatt_server *server,
+					bt_gatt_server_debug_func_t callback,
+					void *user_data,
+					bt_gatt_server_destroy_func_t destroy);